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coerceValue-test.js
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coerceValue-test.js
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// @flow strict
import { describe, it } from 'mocha';
import { expect } from 'chai';
import invariant from '../../jsutils/invariant';
import {
GraphQLInt,
GraphQLList,
GraphQLNonNull,
GraphQLScalarType,
GraphQLEnumType,
GraphQLInputObjectType,
} from '../../type';
import { coerceValue } from '../coerceValue';
function expectValue(result) {
expect(result.errors).to.equal(undefined);
return expect(result.value);
}
function expectErrors(result) {
expect(result.value).to.equal(undefined);
const messages = result.errors && result.errors.map(error => error.message);
return expect(messages);
}
describe('coerceValue', () => {
describe('for GraphQLNonNull', () => {
const TestNonNull = new GraphQLNonNull(GraphQLInt);
it('returns no error for non-null value', () => {
const result = coerceValue(1, TestNonNull);
expectValue(result).to.equal(1);
});
it('returns an error for undefined value', () => {
const result = coerceValue(undefined, TestNonNull);
expectErrors(result).to.deep.equal([
'Expected non-nullable type Int! not to be null.',
]);
});
it('returns an error for null value', () => {
const result = coerceValue(null, TestNonNull);
expectErrors(result).to.deep.equal([
'Expected non-nullable type Int! not to be null.',
]);
});
});
describe('for GraphQLScalar', () => {
const TestScalar = new GraphQLScalarType({
name: 'TestScalar',
parseValue(input) {
invariant(typeof input === 'object' && input !== null);
if (input.error != null) {
throw input.error;
}
return input.value;
},
});
it('returns no error for valid input', () => {
const result = coerceValue({ value: 1 }, TestScalar);
expectValue(result).to.equal(1);
});
it('returns no error for null result', () => {
const result = coerceValue({ value: null }, TestScalar);
expectValue(result).to.equal(null);
});
it('returns no error for NaN result', () => {
const result = coerceValue({ value: NaN }, TestScalar);
expectValue(result).to.satisfy(Number.isNaN);
});
it('returns an error for undefined result', () => {
const result = coerceValue({ value: undefined }, TestScalar);
expectErrors(result).to.deep.equal(['Expected type TestScalar.']);
});
it('returns an error for undefined result', () => {
const error = new Error('Some error message');
const result = coerceValue({ error }, TestScalar);
expectErrors(result).to.deep.equal([
'Expected type TestScalar. Some error message',
]);
});
});
describe('for GraphQLEnum', () => {
const TestEnum = new GraphQLEnumType({
name: 'TestEnum',
values: {
FOO: { value: 'InternalFoo' },
BAR: { value: 123456789 },
},
});
it('returns no error for a known enum name', () => {
const fooResult = coerceValue('FOO', TestEnum);
expectValue(fooResult).to.equal('InternalFoo');
const barResult = coerceValue('BAR', TestEnum);
expectValue(barResult).to.equal(123456789);
});
it('returns an error for misspelled enum value', () => {
const result = coerceValue('foo', TestEnum);
expectErrors(result).to.deep.equal([
'Expected type TestEnum. Did you mean FOO?',
]);
});
it('returns an error for incorrect value type', () => {
const result1 = coerceValue(123, TestEnum);
expectErrors(result1).to.deep.equal(['Expected type TestEnum.']);
const result2 = coerceValue({ field: 'value' }, TestEnum);
expectErrors(result2).to.deep.equal(['Expected type TestEnum.']);
});
});
describe('for GraphQLInputObject', () => {
const TestInputObject = new GraphQLInputObjectType({
name: 'TestInputObject',
fields: {
foo: { type: GraphQLNonNull(GraphQLInt) },
bar: { type: GraphQLInt },
},
});
it('returns no error for a valid input', () => {
const result = coerceValue({ foo: 123 }, TestInputObject);
expectValue(result).to.deep.equal({ foo: 123 });
});
it('returns an error for a non-object type', () => {
const result = coerceValue(123, TestInputObject);
expectErrors(result).to.deep.equal([
'Expected type TestInputObject to be an object.',
]);
});
it('returns an error for an invalid field', () => {
const result = coerceValue({ foo: NaN }, TestInputObject);
expectErrors(result).to.deep.equal([
'Expected type Int at value.foo. Int cannot represent non-integer value: NaN',
]);
});
it('returns multiple errors for multiple invalid fields', () => {
const result = coerceValue({ foo: 'abc', bar: 'def' }, TestInputObject);
expectErrors(result).to.deep.equal([
'Expected type Int at value.foo. Int cannot represent non-integer value: "abc"',
'Expected type Int at value.bar. Int cannot represent non-integer value: "def"',
]);
});
it('returns error for a missing required field', () => {
const result = coerceValue({ bar: 123 }, TestInputObject);
expectErrors(result).to.deep.equal([
'Field value.foo of required type Int! was not provided.',
]);
});
it('returns error for an unknown field', () => {
const result = coerceValue(
{ foo: 123, unknownField: 123 },
TestInputObject,
);
expectErrors(result).to.deep.equal([
'Field "unknownField" is not defined by type TestInputObject.',
]);
});
it('returns error for a misspelled field', () => {
const result = coerceValue({ foo: 123, bart: 123 }, TestInputObject);
expectErrors(result).to.deep.equal([
'Field "bart" is not defined by type TestInputObject. Did you mean bar?',
]);
});
});
describe('for GraphQLInputObject with default value', () => {
const TestInputObject = defaultValue =>
new GraphQLInputObjectType({
name: 'TestInputObject',
fields: {
foo: {
type: new GraphQLScalarType({ name: 'TestScalar' }),
defaultValue,
},
},
});
it('returns no errors for valid input value', () => {
const result = coerceValue({ foo: 5 }, TestInputObject(7));
expectValue(result).to.deep.equal({ foo: 5 });
});
it('returns object with default value', () => {
const result = coerceValue({}, TestInputObject(7));
expectValue(result).to.deep.equal({ foo: 7 });
});
it('returns null as value', () => {
const result = coerceValue({}, TestInputObject(null));
expectValue(result).to.deep.equal({ foo: null });
});
it('returns NaN as value', () => {
const result = coerceValue({}, TestInputObject(NaN));
expectValue(result)
.to.have.property('foo')
.that.satisfy(Number.isNaN);
});
});
describe('for GraphQLList', () => {
const TestList = GraphQLList(GraphQLInt);
it('returns no error for a valid input', () => {
const result = coerceValue([1, 2, 3], TestList);
expectValue(result).to.deep.equal([1, 2, 3]);
});
it('returns an error for an invalid input', () => {
const result = coerceValue([1, 'b', true, 4], TestList);
expectErrors(result).to.deep.equal([
'Expected type Int at value[1]. Int cannot represent non-integer value: "b"',
'Expected type Int at value[2]. Int cannot represent non-integer value: true',
]);
});
it('returns a list for a non-list value', () => {
const result = coerceValue(42, TestList);
expectValue(result).to.deep.equal([42]);
});
it('returns an error for a non-list invalid value', () => {
const result = coerceValue('INVALID', TestList);
expectErrors(result).to.deep.equal([
'Expected type Int. Int cannot represent non-integer value: "INVALID"',
]);
});
it('returns null for a null value', () => {
const result = coerceValue(null, TestList);
expectValue(result).to.deep.equal(null);
});
});
describe('for nested GraphQLList', () => {
const TestNestedList = GraphQLList(GraphQLList(GraphQLInt));
it('returns no error for a valid input', () => {
const result = coerceValue([[1], [2, 3]], TestNestedList);
expectValue(result).to.deep.equal([[1], [2, 3]]);
});
it('returns a list for a non-list value', () => {
const result = coerceValue(42, TestNestedList);
expectValue(result).to.deep.equal([[42]]);
});
it('returns null for a null value', () => {
const result = coerceValue(null, TestNestedList);
expectValue(result).to.deep.equal(null);
});
it('returns nested lists for nested non-list values', () => {
const result = coerceValue([1, 2, 3], TestNestedList);
expectValue(result).to.deep.equal([[1], [2], [3]]);
});
it('returns nested null for nested null values', () => {
const result = coerceValue([42, [null], null], TestNestedList);
expectValue(result).to.deep.equal([[42], [null], null]);
});
});
});